/**
 * Persist allow/deny patterns next to agent sessions.
 */

const path = require('path');
const fs = require('fs');
const { ensureAgentRoot, ensureDir } = require('../lib/paths.js');
const rules = require('./perm-rules.js');

function rulesFile() {
  return path.join(ensureDir(ensureAgentRoot()), 'permission-rules.json');
}

function load() {
  try {
    const raw = JSON.parse(fs.readFileSync(rulesFile(), 'utf8'));
    return Array.isArray(raw) ? raw : [];
  } catch (_) {
    return [];
  }
}

function save(list) {
  const next = Array.isArray(list) ? list : [];
  fs.writeFileSync(rulesFile(), JSON.stringify(next, null, 2));
  return next;
}

function resolve(tool, args) {
  return rules.resolve(load(), tool, args);
}

function remember(tool, args, decision) {
  return save(rules.addRule(load(), tool, args, decision));
}

function rememberAlways(tool) {
  const args = String(tool) === 'run_terminal_cmd' ? { command: '*' } : { path: '*' };
  return remember(tool, args, 'allow');
}

module.exports = { rulesFile, load, save, resolve, remember, rememberAlways };